要让Lucene匹配查询中的所有单词,您需要使用布尔查询(BooleanQuery)。布尔查询允许您组合多个查询条件,例如匹配所有单词、部分单词或者排除某些单词。以下是一个简单的示例,展示了如何使用布尔查询来匹配查询中的所有单词:
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.index.DirectoryReader;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.IndexWriterConfig;
import org.apache.lucene.queryparser.classic.QueryParser;
import org.apache.lucene.search.BooleanClause;
import org.apache.lucene.search.BooleanQuery;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.ScoreDoc;
import org.apache.lucene.search.TopScoreDocCollector;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.RAMDirectory;
public class LuceneBooleanQueryExample {
public static void main(String[] args) throws Exception {
Directory directory = new RAMDirectory();
IndexWriterConfig config = new IndexWriterConfig(new StandardAnalyzer());
IndexWriter indexWriter = new IndexWriter(directory, config);
// 添加文档
Document document1 = new Document();
document1.add(new TextField("content", "Lucene is a search library", Field.Store.YES));
indexWriter.addDocument(document1);
Document document2 = new Document();
document2.add(new TextField("content", "Apache Lucene is a powerful search engine", Field.Store.YES));
indexWriter.addDocument(document2);
indexWriter.close();
IndexReader indexReader = DirectoryReader.open(directory);
IndexSearcher indexSearcher = new IndexSearcher(indexReader);
// 创建布尔查询
BooleanQuery.Builder booleanQueryBuilder = new BooleanQuery.Builder();
QueryParser queryParser = new QueryParser("content", new StandardAnalyzer());
// 添加查询条件
Query query1 = queryParser.parse("Lucene");
Query query2 = queryParser.parse("search");
booleanQueryBuilder.add(query1, BooleanClause.Occur.MUST);
booleanQueryBuilder.add(query2, BooleanClause.Occur.MUST);
// 执行查询
Query booleanQuery = booleanQueryBuilder.build();
TopScoreDocCollector collector = TopScoreDocCollector.create(10);
indexSearcher.search(booleanQuery, collector);
// 输出结果
ScoreDoc[] hits = collector.topDocs().scoreDocs;
for (int i = 0; i< hits.length; i++) {
Document hitDoc = indexSearcher.doc(hits[i].doc);
System.out.println("Hit " + i + " : " + hitDoc.get("content"));
}
indexReader.close();
directory.close();
}
}
在这个示例中,我们创建了一个包含两个文档的索引,然后使用布尔查询来匹配包含"Lucene"和"search"两个单词的文档。最后,我们输出匹配的文档内容。
请注意,这个示例仅用于演示如何使用布尔查询来匹配查询中的所有单词。在实际应用中,您需要根据您的需求和数据来调整查询条件和索引结构。
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